重点研究了结合梁斜拉桥的力学性能,特别针对连接两幅主梁的横梁,进行了详细的计算分析。结合某工程方案,利用Midas Civil 2010桥梁专用程序建立空间有限元模型,对一座主跨400 m的双塔分幅结合梁斜拉桥方案进行了静力计算,在静力荷载作用下,研究分析了连接两幅主梁的横梁在不利受力状态下的受力性能,并改变连接横梁的参数,分析其对钢主梁和混凝土桥面板力学性能的影响。 The mechanical properties of the cable-stayed bridge with integrated beam are studied emphatically, especially for the beam connected with two main girders, and the detailed calculation and analysis are carried out. Combined with a project scheme, a finite element model of the Midas Civil 2010 bridge was established to calculate the static load of a 400 m-span double-girded composite beam-stayed bridge with main span. Under the action of static load, The mechanical behavior of beams connected with two main girders under adverse stress was studied. The parameters of connecting beams were changed, and the influences on the mechanical properties of steel girders and concrete bridge slabs were analyzed.